pock 
(pŏk)
(pŏk)n.
1. A pustule caused by smallpox or a similar eruptive disease.
2. A mark or scar left in the skin by such a pustule; a pockmark.
tr.v. pocked, pock·ing, pocks
To mark with pocks; pit.
[Middle English pokke, from Old English pocc.]
pocky adj.